diff --git a/schainpy/__init__.py b/schainpy/__init__.py
index 2d51a72..a74d16c 100644
--- a/schainpy/__init__.py
+++ b/schainpy/__init__.py
@@ -4,4 +4,4 @@ Created on Feb 7, 2012
 @author $Author$
 @version $Id$
 '''
-__version__ = "2.2.4"
\ No newline at end of file
+__version__ = "2.2.4.1"
\ No newline at end of file
diff --git a/schainpy/model/io/jroIO_usrp.py b/schainpy/model/io/jroIO_usrp.py
index f754fc7..cf61870 100644
--- a/schainpy/model/io/jroIO_usrp.py
+++ b/schainpy/model/io/jroIO_usrp.py
@@ -227,12 +227,20 @@ class USRPReader(ProcessingUnit):
         metadata_dict = self.digitalReadObj.get_rf_file_metadata(channelNameList[channelList[0]])
         
         self.__sample_rate = metadata_dict['sample_rate'][0]
-        self.__samples_per_file = metadata_dict['samples_per_file'][0]
+#         self.__samples_per_file = metadata_dict['samples_per_file'][0]
         self.__deltaHeigth = 1e6*0.15/self.__sample_rate
         
         this_metadata_file = self.digitalReadObj.get_metadata(channelNameList[channelList[0]])
         
-        self.__frequency = this_metadata_file['center_frequencies'].value
+        self.__frequency = None
+        try:
+            self.__frequency = this_metadata_file['center_frequencies'].value
+        except:
+            self.__frequency = this_metadata_file['fc'].value
+        
+        if not self.__frequency:
+            raise ValueError, "Center Frequency is not defined in metadata file"
+        
         try:
             self.__timezone = this_metadata_file['timezone'].value
         except: